The Chinese Academy of Science Mt. Zijinshan Observatory, is one of our country most famous astronomical observatories. Built in 1934, completed in 1934 September, located at Nanjing east Nanjiao fine scenery in Mt. Zijinshan. the Mt. Zijinshan Observatory was the first modern astronomy development facility which our country established, the predecessor is established February's, 1928 state-run Academia Sinica astronomy research institute, until now had 80 year history. The Mt. Zijinshan Observatory completes symbolizes our country modern astronomy research start. The Chinese modern astronomy's many branch discipline and the astronomical observatory stand mostly are born from here, set up and develop. Because she makes in the Chinese astronomy enterprise establishment and the development the special contribution, is honored as “the Chinese modern astronomy cradle”.